/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2015 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.space;

import org.jpos.core.Configurable;
import org.jpos.core.Configuration;
import org.jpos.core.ConfigurationException;

import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.io.Serializable;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.*;
import java.util.Set;

/**
 * RMI Space Proxy
 *
 * @author Alejandro Revilla
 * @author Niclas Hedhman
 * @version $Revision$ $Date$
 * @since 1.4.9
 */
@SuppressWarnings("unchecked")
public class SpaceProxy implements RemoteSpace, Configurable {
	Space sp;
	Configuration cfg;
	private RemoteRef ref;
	private RemoteStub stub;

	public SpaceProxy() throws RemoteException {
		super();
		sp = SpaceFactory.getSpace();
		startService();
	}

	public SpaceProxy(String spaceUri) throws RemoteException {
		super();
		sp = SpaceFactory.getSpace(spaceUri);
		startService();
	}

	private void startService() throws RemoteException {
		try {
			LocateRegistry.createRegistry(Registry.REGISTRY_PORT);
		} catch (ExportException ignored) {
			// NOPMD: ok to happen
		}
		stub = UnicastRemoteObject.exportObject(this);
		ref = stub.getRef();
	}

	public void out(Serializable key, Serializable value)
			throws RemoteException {
		sp.out(key, value);
	}

	public void out(Serializable key, Serializable value, long timeout)
			throws RemoteException {
		sp.out(key, value, timeout);
	}

	public Serializable in(Serializable key)
			throws RemoteException {
		return (Serializable) sp.in(key);
	}

	public Serializable rd(Serializable key)
			throws RemoteException {
		return (Serializable) sp.rd(key);
	}

	public Serializable in(Serializable key, long timeout)
			throws RemoteException {
		return (Serializable) sp.in(key, timeout);
	}

	public Serializable rd(Serializable key, long timeout)
			throws RemoteException {
		return (Serializable) sp.rd(key, timeout);
	}

	public Serializable inp(Serializable key)
			throws RemoteException {
		return (Serializable) sp.inp(key);
	}

	public Serializable rdp(Serializable key)
			throws RemoteException {
		return (Serializable) sp.rdp(key);
	}

	public void shutdown() {
		try {
			if (UnicastRemoteObject.unexportObject(this, false))
				return;
			Thread.sleep(5000);
			UnicastRemoteObject.unexportObject(this, true);
		} catch (Exception ignored) {
			// NOPMD: nothing to do .. we're shutting down ...
		}
	}

	public void setConfiguration(Configuration cfg)
			throws ConfigurationException {
		this.cfg = cfg;
		try {
			InitialContext ctx = new InitialContext();
			ctx.rebind(cfg.get("name"), stub);
		} catch (NamingException e) {
			throw new ConfigurationException(e);
		}
	}

	public Set getKeySet() {
		if (sp instanceof LocalSpace)
			return ((LocalSpace) sp).getKeySet();
		else
			return null;
	}

	public String toString() {
		if (ref == null)
			return getClass().getName() + "[<unexported>]";
		else
			return getClass().getName() + "[" + ref.remoteToString() + "]";
	}

	public int hashCode() {
		if (ref == null)
			return super.hashCode();
		else
			return ref.remoteHashCode();
	}

	public boolean equals(Object obj) {
		if (obj instanceof RemoteObject) {
			if (ref == null) {
				return obj == this;
			} else {
				RemoteRef otherRef = ((RemoteObject) obj).getRef();
				return ref.remoteEquals(otherRef);
			}
		} else if (obj != null) {
			return obj.equals(this);
		} else {
			return false;
		}
	}
}

